GM Service Manual Online
For 1990-2009 cars only

The Circuit Testing section contains the following diagnostic testing information. Using this information along with the diagnostic procedures will identify the cause of the electrical malfunction.

    •  Using Connector Test Adapters
    •  Probing Electrical Connectors
    •  Troubleshooting with a Digital Multimeter
    •  Troubleshooting with a Test Lamp
    •  Using Fused Jumper Wires
    •  Measuring Voltage
    •  Measuring Voltage Drop
    •  Measuring Frequency
    •  Testing for Continuity
    •  Testing for Short to Ground
    •  Testing for a Short to Voltage
    •  Testing for Intermittent Conditions and Poor Connections
    •  Inducing Intermittent Fault Conditions
    •  Testing for Electrical Intermittents
    •  Scan Tool Snapshot Procedure
    •  Circuit Protection - Fuses
    •  Circuit Protection - Circuit Breakers
    •  Circuit Protection - Fusible Links